The door may be the most important design decision in this game ever. The pacing of the game is perfect, but always suffered from the timer counting down immediately after the player presses the restart button. With the inclusion of the brand new door mechanic, the player is in control of their own pacing, allowed to begin the game at any desired moment, which may be greatest contribution to pacing in storytelling ever conceived. I am in control. I choose to go in and spread. I am spreading. I am the spreader. That is the player experience.